Genes with novel functions are most commonly produced by ____
a. inversion of DNA sequences
b. nondisjunction during meiosis
c. unequal crossing-over
d. exon shuffling
e. small mutations
ANSWER: d
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Which of the following is a correct statement about pepsin?
A. It is manufactured by the pancreas. B. It helps stabilize fat-water emulsions. C. It splits maltose into monosaccharides. D. It is activated by the action of HCl on pepsinogen. E. It is denatured and rendered inactive in solutions with low pH.
Cladistics is based upon evolutionary relationships which generate ___________ structures.
Fill in the blank(s) with the appropriate word(s).
In what type of environment would you be most likely to find anaerobes?
A) high temperature B) high salt content C) high acidity D) no oxygen
There are thousands of different restriction enzymes that each cut ___ at different sequences.
Fill in the blank(s) with correct word.